vacuum equipment

The drive shaft connects the active rotor and drives the driven rotor to rotate by synchronous gear. A cooling water passage is opened on the shell to cool the temperature of the rotor and the exhaust port. The synchronous gear and bearing are lubricated by oil. The inside of the bearing and the shell is sealed by sealing parts to achieve oil-free effect. The structure of dry screw vacuum pump is similar to that of oil-free screw compressor in sealing and lubrication. In general, mechanical seals are used at the exhaust end of vacuum pump and double lip seals are used at the intake side. In terms of transmission mode, the current general purpose is direct-connected motor, which is connected with the rotor by coupling, and very few are driven by belt or transmission chain. Because of no internal compression process, the exhaust temperature of the equal pitch screw pump is very high. If the cooling effect is not good, it will cause the deformation of the rotor and the casi

The main body of the application organization for anticorrosion technology of water ring vacuum pump is enterprise, which mainly includes Nantong Longying Vacuum Pump Industry Co., Ltd., Hubei Tongfang High-tech Pump Industry Co., Ltd., Shanghai Hugang Vacuum Pump Manufacturing Co., Ltd., and related patents of anticorrosion technology of water ring vacuum pump. The title, abstract, legal status and other information are interpreted manually, and 19 key patents are selected after expert review. This section will focus on the interpretation of these patents. Through the analysis of the patent of vacuum pump anti-corrosion technology, the following conclusions can be drawn: 1. Vacuum pump has entered a period of rapid development. Starting in 2007, the number of patent applications for vacuum pumps worldwide began to accelerate. China and Japan are the main acceptance countries of anti-corrosion patents for vacuum pumps in the world, but Chinese patentees have not formed o

In order to make the energy transferred from the supplementary water to Roots vacuum pump unit work effectively on the gas and improve its efficiency, the supplementary water should enter at the end of the liquid work on the gas, that is, at the highest point of the compression chamber, so that the unit can obtain sufficient energy and start again at the next cycle rotation. So what's the reason? The following knowledge will be introduced to you in detail: 1. Loss of the exhaust hole of the supplementary liquid ring with the gas flow; 2. End clearance between sealing pump body and impeller; 3. Compression heat produced by discharging compressed gas; 4. Cooling and lubricating fillers, packing glands and other parts. If the amount of supplementary water is large, excessive water takes up part of the gas space (also can be considered as the increase of the thickness of the water ring), which reduces the gas volume and exhaust pressure. Too much water also increases pow

In summer high temperature season of water ring vacuum pump, when the unit reaches a certain load and the condenser pressure rises to 12.2 kPa, the air intake solenoid valve of the front exhauster interlocks and closes, so that the front exhauster bypass diaphragm valve opens automatically, and the water ring vacuum pump pumps vacuum directly to the condenser through the inlet isolation valve of the vacuum pump group and the front exhauster bypass diaphragm valve. With the increase of steam temperature, the water in the vacuum pump begins to vaporize, and the noise and vibration of the instantaneous rupture of bubbles in the pump occur. The vacuum pump is tested. The parameters of the vacuum pump before and after cavitation are shown in Table 1. In order to protect equipment and maintain unit operation, frequent switching of vacuum pumps and reducing unit output have to be adopted to maintain unit operation. Water ring vacuum pump has the advantage of high efficiency in

When referring to the leakage phenomenon of vacuum pump unit, we should pay attention to the fact that most of it will occur on a device with water-cooled jacket. Referring to the phenomenon of internal leakage of vacuum pump unit, in fact, we did not find any doubtful points when we looked at the leakage, but in fact, the pumping speed of its mechanical pump will be significantly lower, and the vacuum gauge is relatively low or the mechanical pump oil is quickly emulsified. ​ Vacuum pump unit Next, we will find that the iron-based parts in the vacuum chamber of the vacuum pump unit will be significantly corroded. In fact, we can basically conclude that it has an internal leakage phenomenon. At this time, we should also pay attention to the cleaning of the inner wall. Next, we should pay attention to the cooling water to see if it has a wet point. Its wet point is its leak point. In fact, the leakage of vacuum pump unit is very difficult to check. Our common method is to

(1) K-shaped dynamic seal will not drip and leak during normal operation. (2) If there is a cooling water device, check whether the water flow is normal. Pump shutdown: (1) When the rotary vane vacuum pump stops, the outlet valve should be closed first, in order to prevent the backstop valve from failing and the pressure water from the outlet pipe from backfilling into the pump, causing the impeller to reverse and causing damage to the pump. (2) When stopping the pump, if the inertia is small, that is, the pump will stop soon after power failure, indicating that there is a Mocha or eccentricity in the pump. The three steps of starting, running and stopping of rotary vane vacuum pump are very important, but the most important step is the adjustment of outlet valve. If it is in the suction state, the opening of the outlet valve can be relatively large, and if it is in the backfilling state, the opening of the outlet valve can be relatively small. The closer the working poi

Water-ring vacuum pump in order to adhere to the water-ring type of certain volume and heat discharge, it is necessary to keep water circulating through the vacuum pump. For the purpose of supplying water to vacuum pumps, the equipment is a special water tank connected with the discharge pipe. There is a door on the box to regulate the amount of circulating water. The used water and air are put into the tank together, sometimes directly supplied by the water supply pipe to the vacuum pump. Figure 1 shows a schematic diagram of such a vacuum pump device. The average consumption of circulating water is 50-300 liters per hour. In order to avoid the abrasion of windy end surface, there should be no mechanical mixtures in circulating water, because the pumping capacity of vacuum pump decreases with the increase of gap. It is necessary to note that the gap should not be greater than 0.1 mm. When the gap is enlarged, the section of the cover should be frustrated. The order of s

Axis Breakage of Water Ring Vacuum Pump: After 2 years of use, water ring vacuum pump will present the phenomenon of excessive noise, excessive starting current, remarkable decrease in pumping capacity and vacuum degree. It is found that the scale inside the pump body is severe after the technical staff of our company disassembled and inspected. The reason for scaling is that the water contains calcium, magnesium and other carbonate substances. When the pump is heated and heated, its solubility decreases, and molecule-bound deposits form scales. What measures should be adopted to avoid axle breakage? Water ring vacuum pump Through the analysis of the causes of shaft breakage of water ring pump, the following corresponding measures are adopted. 1. Revamping the original process equipment to reduce the content of impurities in acetylene gas trap: At the same time, the large well water of water ring vacuum pump is changed into circulating water to reduce the hardness of wat